Change Font of Standard Template
 

Is it possible to change the font used in the Standard template to a Google Font?

I don't think you can use @import under Custom CSS & JS.

This is what I added:

@import url('https://fonts.googleapis.com/css?family=Lato');

body, .navbar-nav, .head-h2, .head-h3, .sidebar {
font-family: 'Lato', sans-serif;
}

Re: Change Font of Standard Template
 

I would create simple module, decorate View/CommonResources class

protected function getCommonFiles()

XC loads there "Open Sans" font from Google fonts and you can remove it and add Lato.
This has to be done with custom module - don't just modify the XC file.

You may need to modify some css files as well and replace every reference to "Open Sans" with "Lato"

OR you can also try with @font-face as this will create an alias for the "Open Sans"

@font-face {
font-family: "Open Sans";
src: url(/local/path/to/Lato);
}